The arrary contents are 
1. C:\abc\dfg\axy
2. C:\abc\dfg\#@$#@$@\hwllo

$key="C:\abc\dfg"


   $key=~s/(\\[!@#$%^&(),.\}\{[\]+-])/\\$1/g;
   $line=~s/(\\[!@#$%^&(),.\}\{[\]+-])/\\$1/g;
	   
   if( $line =~ /$key\\\S+\\/){ # if this is not node 
      ($pat)=$line=~/$key\\(\S+)\\/;
   }else{                      # if end node 
      ($last_node)=$line=~/$key\\(.*)/;
  }